KR102179210B1 - Apparatus for processing eyeglass lens, program and storage medium - Google Patents

Abstract

assignment
There is provided a spectacle lens processing apparatus, a program, and a storage medium for performing grooving more accurately by reducing the influence of the angle of the grooving tool with respect to the lens and the diameter of the grooving tool.
Solution
The CPU acquires information on the trajectory of the front edge portion located on the front side of the lens among the pair of edge portions of the grooves formed in the lens (S2). Among the edge portions of a pair of grooves, information on the trajectory of the rear edge portion located on the rear side of the lens is acquired (S3). The CPU calculates the relative trajectory of the grooved hole with respect to the lens when forming the front edge portion on the lens, based on the relative angle of the grooved hole with respect to the lens and the diameter of the grooved hole (S5). . The relative trajectory of the grooving tool when forming the rear edge portion on the lens is calculated based on the relative angle of the grooving tool and the machining tool diameter (S6).

Description

Eyeglass lens processing device, program, and storage medium {APPARATUS FOR PROCESSING EYEGLASS LENS, PROGRAM AND STORAGE MEDIUM}

The present disclosure relates to a spectacle lens processing apparatus, a program, and a storage medium for processing a peripheral edge of a spectacle lens.

Conventionally, a technique for forming a groove in a peripheral edge of a spectacle lens has been proposed. For example, in the spectacle lens processing apparatus disclosed in Patent Literature 1, a position obtained by dividing the edge thickness of the lens at a certain ratio, or a position shifted from the edge position of the front of the lens to the rear side by a certain amount, is the grooved processing tool. Grooving data for controlling trenching to pass through is created.

Japanese Unexamined Patent Publication No. 2003-145400

In the grooving step, a grooving tool having a circular annular shape of a portion that contacts the lens is sometimes used. In this case, due to the influence of the relative angle of the grooving tool with respect to the lens and the diameter of the grooving tool, the width of the groove actually formed may be wider than the thickness of the grooving tool. In the prior art, it has been difficult to perform grooving while reducing the influence of the relative angle of the grooving tool and the tool diameter.

An object of the present disclosure is to provide a spectacle lens processing apparatus, a program, and a storage medium for performing grooving more accurately by reducing the influence of the angle of the grooving tool on the lens and the diameter of the grooving tool. .

The spectacle lens processing apparatus according to the first aspect of the present disclosure includes a grooved hole having a circular annular shape at a portion contacting the lens, and by relatively moving the grooved hole with respect to the peripheral edge of the lens. A spectacle lens processing apparatus for forming a groove at a peripheral edge of the lens, wherein of the pair of edge portions of the grooves formed in the lens, information on a trajectory of a front edge portion located at a front side of the lens is obtained A front-side information acquisition means for acquiring information on a trajectory of a rear-side edge portion located on a rear side of the lens among the pair of edge portions; and a front-side edge on the lens. When forming a portion, a front side trajectory, which is a relative trajectory of the grooving tool with respect to the lens, is calculated based on a relative angle of the grooving tool with respect to the lens and a processing tool diameter of the grooving tool A lens trajectory calculation means, and a rear surface for calculating a rear-side trajectory, which is a relative trajectory of the grooved hole with respect to the lens when the rear-side edge portion is formed on the lens, based on the relative angle and the processing tool diameter And a side lens trajectory calculation means.

The program related to the second aspect of the present disclosure calculates a trajectory of a relative movement of a grooved tool having a circular annular shape of a portion contacting the lens with respect to the peripheral edge of the lens in order to form a groove at the peripheral edge of the lens. A grooving trajectory calculation program executed by a calculating device to calculate, wherein among the edge portions of a pair of grooves formed in the lens by the grooving trajectory calculation program being executed by a processor of the calculation device, in the lens, A front side information acquisition step of acquiring information on the trajectory of the front edge portion located on the front side of the pair, and of the pair of edge portions, acquiring information on the trajectory of the rear edge portion located on the rear side of the lens. The rear side information acquisition step of performing, and when forming the front edge portion on the lens, a front side trajectory, which is a relative trajectory of the grooved hole with respect to the lens, is a relative angle of the grooved hole with respect to the lens, and A front-side lens trajectory calculation step, which is calculated based on the processing hole diameter of the grooved hole, and a rear-side trajectory, which is a relative trajectory of the grooved hole with respect to the lens, when forming the rear-side edge portion on the lens. And a rear-side lens trajectory calculation step calculated based on the relative angle and the processing tool diameter is performed in the calculation device. The second aspect of the present disclosure further includes a storage medium in which the grooved trajectory calculation program is stored.

According to the technology of the present disclosure, the spectacle lens processing apparatus can perform grooving more accurately by reducing the influence of the angle of the grooving tool with respect to the lens and the diameter of the grooving tool.

1 is a schematic configuration diagram of a processing mechanism of a spectacle lens processing apparatus 1.
2 is a front view of the second lens processing unit 40.
3 is a block diagram showing the electrical configuration of the spectacle lens processing apparatus 1.
FIG. 4 is a schematic diagram for explaining the influence of the relative angle of the grooving tool 442 with respect to the lens LE on the width of the groove.
5 is a flow chart of a grooved trajectory calculation process executed by the spectacle lens processing apparatus 1.
Fig. 6 is a diagram schematically showing a relative positional relationship between the trajectory of a groove to be formed and the grooving tool 442 on three-dimensional coordinates.
Fig. 7 is a schematic diagram showing a state in which the front edge of the groove is cut while the X coordinate of the center C of the grooving tool 442 is x _n and the Y coordinate is y _n .
Fig. 8 is a schematic diagram showing a state in which a groove is formed in the lens LE by the grooving tool 442 having a thickness T.
Fig. 9 is a schematic diagram showing a state in which the edge of the groove is wider than planned.

Hereinafter, a typical embodiment will be described with reference to the drawings. As shown in Fig. 1, the spectacle lens processing apparatus (lens edger) 1 according to the present embodiment includes a lens holding unit 10, a lens shape measuring unit 20, a first lens processing unit 30, and a Two lens processing units 40 are mainly provided. The spectacle lens processing apparatus 1 clamps the lens LE by the two lens chuck shafts 16L and 16R of the lens holding portion 10. The spectacle lens processing apparatus 1 changes the relative positional relationship between the first lens processing unit 30 and the second lens processing unit 40, and the lens LE held by the lens chuck shafts 16L and 16R. Process the lens LE.

In the following description, the direction in which the distance between the axes of the lens chuck shafts 16L and 16R and the first processing tool rotation shaft 32 of the first lens processing unit 30 fluctuates is referred to as the X direction. The direction in which the lens chuck shafts 16L and 16R extend is taken as the Z direction. The Y direction becomes a substantially vertical direction of the spectacle lens processing apparatus 1. In addition, the lower side inclined to the right, the upper side inclined to the left, the upper side inclined to the right, and the lower side inclined to the left are set to the front side, the rear side, the right side and the left side of the spectacle lens processing apparatus 1, respectively.

<Lens holding part>

The lens holding unit 10 includes shafts 11 and 12, a Z-axis moving device 13, and a carriage 15. The shaft 11 is fixed to the center of the base 2 in the front-rear direction of the spectacle lens processing apparatus 1. The shaft 12 is fixed to the left front end of the base 2. Both of the two shafts 11 and 12 extend in the Z-axis direction (that is, in the direction parallel to the lens chuck axes 16L and 16R). The Z-axis moving device 13 is supported so as to be movable in the Z-axis direction by two shafts 11 and 12. The carriage 15 is mounted on the Z-axis moving machine 13.

The carriage 15 is provided with a left arm 15L on the left side and a right arm 15R on the right side. The left arm 15L holds the lens chuck shaft 16L rotatably. The right arm 15R holds the lens chuck shaft 16R rotatably. The two lens chuck axes 16L and 16R are located on the same axis. The right lens chuck shaft 16R is moved in the Z-axis direction by the clamping motor 161 attached to the right arm 15R. The spectacle lens processing apparatus 1 holds the lens LE between the two lens chuck shafts 16L and 16R by moving the right lens chuck shaft 16R to the left. A lens rotation motor 162 for rotating two lens chuck shafts 16L and 16R is formed on the right arm 15R. When the lens rotation motor 162 rotates, the two lens chuck shafts 16L and 16R rotate around the shaft in synchronization.

In the vicinity of the left end of the shaft 11, a motor 171 for Z-axis movement is attached. A ball screw (not shown) extending in the Z-axis direction parallel to the shaft 11 is formed at the rear portion of the Z-axis moving device 13. When the motor 171 for Z-axis movement rotates, the ball screw rotates. As a result, the Z-axis moving machine 13 and the carriage 15 linearly move in the Z-axis direction. An encoder 172 is formed in the motor 171 for Z-axis movement. The encoder 172 detects the movement of the carriage 15 in the Z direction by detecting the rotation of the motor 171 for Z-axis movement.

Between the Z-axis moving machine 13 and the left arm 15L of the carriage 15, a guide shaft 18 and a ball screw 19 are formed in parallel. In the vicinity of the front end of the Z-axis moving machine 13, an X-axis moving motor 191 is formed. When the motor 191 for X-axis movement rotates, the ball screw 19 rotates. As a result, the carriage 15 rotates around the shaft 11. The spectacle lens processing apparatus 1 rotates the carriage 15 so that the first lens processing unit 30 and the second lens processing unit 40 and the lens LE sandwiched by the lens chuck shafts 16L and 16R are Change the relative positional relationship. In short, the spectacle lens processing apparatus 1 drives the motor 191 for X-axis movement so that the first lens processing unit 30 and the second lens processing unit 40 are moved relative to the lens LE in the X direction. Move. Further, the spectacle lens processing apparatus 1 may perform processing by moving the first lens processing unit 30 and the second lens processing unit 40. In short, the spectacle lens processing apparatus 1 just needs to have a structure which moves the 1st lens processing unit 30 and the 2nd lens processing unit 40 relatively with respect to the lens LE. An encoder 192 is formed in the motor 191 for X-axis movement. The encoder 192 detects the movement of the carriage 15 in the X direction by detecting the rotation of the motor 191 for X-axis movement.

<Lens shape measurement unit>

The lens shape measuring unit 20 is formed behind the carriage 15. The lens shape measurement unit 20 includes a measurer 21 that contacts the front surface of the lens LE and a measurer 22 that contacts the rear surface of the lens LE. The measuring elements 21 and 22 are held by an arm 23 movable in the Z direction. The lens shape measurement unit 20 is provided with a sensor 231 (see Fig. 3) for detecting the position of the arm in the Z direction. When measuring the lens shape, the spectacle lens processing apparatus 1 controls the movement of the lens chuck shafts 16L and 16R in the X direction while rotating the lens chuck shafts 16L and 16R. do. As a result, the positions in the Z direction of the front and rear surfaces of the lens corresponding to the jade shape are detected by the sensor 231. In addition, in the spectacle lens processing apparatus 1 of this embodiment, the lens shape is measured using also the movement control of the Z direction of the lens chuck shafts 16L and 16R.

<1st lens processing unit>

The first lens processing unit 30 is formed in front of the carriage 15. The first lens processing unit 30 includes a first processing tool 31, a first processing tool rotating shaft 32, and a first processing tool rotating motor 321. The first processing tool 31 is provided with a rough grinding stone 311 for glass, a grinding stone 312 for finishing, a grinding stone 313 for flat mirror surface finishing, and a rough grinding stone 314 for plastics. The finishing grindstone 312 is provided with a V groove (weak groove) VG and a flat surface for forming a weak edge in the lens LE. The first processing tool rotation shaft 32 extends in the Z-axis direction, and fixes a plurality of substantially disk-shaped grinding stones provided in the first processing tool 31 on the same axis. The first machining tool rotation motor 321 is connected to the right end of the first machining tool rotation shaft 32. When the first processing tool rotation motor 321 rotates, the first processing tool rotation shaft 32 and the first processing tool 31 rotate around the axis. The spectacle lens processing apparatus 1 processes the peripheral edge of the lens LE by bringing the lens LE into contact with the first processing tool 31.

<2nd lens processing unit>

The second lens processing unit 40 is formed behind the carriage 15. The second lens processing unit 40 is fixedly disposed in line with the lens shape measurement unit 20 outside the moving range of the lens shape measurement unit 20.

As shown in Fig. 2, the second lens processing unit 40 includes a base block 41, a holding member 42, a second processing tool rotation shaft 43, a second processing tool 44, and a second processing tool. It is provided with a rotation motor (431). The base block 41 is fixed to the base 2 (see Fig. 1) and extends upward from the base 2. The holding member 42 is fixed to the upper end of the base block 41, and holds the second processing tool rotation shaft 43 rotatably. The second processing tool 44 includes a chamfering stone 441 for the rear of the lens, a groove cutting tool 442 and a chamfering stone 443 for the front of the lens. In this embodiment, the chamfering grindstones 441 and 443 and the grooving tool 442 are integrally formed, but may be formed separately.

The maximum diameter of the chamfering grindstones 441 and 443 is a diameter smaller than the diameter of the grooving tool 442 (about 20 mm). The shape of the chamfered grindstones 441 and 443 is a tapered shape whose diameter decreases as it moves away from the grooving tool 442. The spectacle lens processing apparatus 1 performs chamfering of the lens LE by bringing the chamfer grinding stones 441 and 443 into contact with the edge portions of the lens LE.

The shape of the portion of the grooving processing tool 442 in contact with the lens LE is a circular ring shape. Therefore, the spectacle lens processing apparatus 1 can form a groove in the peripheral edge of the lens by making contact with the lens LE while rotating the grooved hole 442. In this embodiment, the grooving tool 442 is integrated with the chamfer grinding stones 441 and 443. However, you may use the groove|grooving tool 442, such as a disk shape, independently. In addition, in this embodiment, a grindstone is used as the grooving tool 442. However, the configuration of the grooving tool 442 may be changed. For example, a cutter having a substantially disk shape or a substantially annular shape having a toothed wheel on the outer periphery may be used as the grooving tool 442. In the present embodiment, the diameter R of the grooving tool 442 (that is, the diameter of the outer circumferential portion of the grooving tool 442 having a circular annular shape) is 19 mm. The thickness T of the processed portion located at the outer peripheral end of the grooving processing tool 442 is 0.5 mm. In addition, it goes without saying that the diameter (R) and the thickness (T) of the grooved hole 442 can be changed.

In this embodiment, the axial direction of the 2nd processing tool rotation shaft 43 is fixed. Specifically, as shown in FIG. 1, the axis line S1 of the second processing tool rotation shaft 43 is at a relatively predetermined angle with respect to the axis line S2 of the lens chuck shafts 16L and 16R (in this embodiment, 15 Fig.) It is tilted. The relative angle of the grooving tool 442 with respect to the lens LE is determined by the angles in the two axial directions S1 and S2. Specifically, the relative angle between the plane to which the circularly-shaped grooved portion 442 belongs and the plane of the substantially plate-shaped lens LE coincides with the angles of the two axis lines S1 and S2. In the present embodiment, since the axial direction of the second machining tool rotation shaft 43 is fixed, the relative angle of the grooved machining tool 442 with respect to the lens LE and the lens chuck shafts 16L and 16R is constant. The structure of the spectacle lens processing apparatus 1 is simplified by omitting the mechanism for changing the axial direction of the second processing tool rotation shaft 43. Thus, the size and cost of the device can be easily reduced. However, even when changing the axial direction of the second processing tool rotation shaft 43, the technique illustrated in the present disclosure can be applied.

<Electrical configuration>

Referring to Fig. 3, the electrical configuration of the spectacle lens processing apparatus 1 will be described. The spectacle lens processing apparatus 1 includes a CPU 5 which is a processor in charge of controlling the spectacle lens processing apparatus 1. The CPU 5 is connected to a RAM 6, a ROM 7, a nonvolatile memory 8, an operation unit 50, a display 55, and an external communication I/F 59 via a bus. In addition, the CPU 5 includes various devices such as the aforementioned motor (the clamping motor 161, the lens rotation motor 162, the Z-axis movement motor 171, the X-axis movement motor 191, and the first processing tool). A rotation motor 321, a second machining tool rotation motor 431, an encoder 172, an encoder 192 and a sensor 231 are connected via a bus.

The RAM 6 temporarily stores various types of information. Various programs, initial values, and the like are stored in the ROM 7. The nonvolatile memory 8 is a readable and writable storage medium (for example, a flash ROM, a hard disk drive, etc.) capable of holding the storage contents even when the supply of power is cut off. In the nonvolatile memory 8, a control program for controlling the operation of the spectacle lens processing apparatus (for example, a grooving path calculation program for controlling the grooving path calculation process shown in Fig. 5) is stored. The operation part 50 is formed in order to accept input of various instructions from an operator. For example, operation buttons, a touch panel formed on the surface of the display 55 can be used as the operation unit 50. The display 55 displays various types of information such as the shape of the lens LE and the shape of the frame. The external communication I/F 59 connects the spectacle lens processing apparatus 1 to an external device.

In this embodiment, the spectacle lens processing apparatus 1 is connected to the frame shape measuring apparatus 60 (for example, those disclosed in Japanese Unexamined Patent Application Publication No. Hei 4-93164). The frame shape measuring device 60 measures the shape of the frame. The spectacle lens processing apparatus 1 acquires data indicating the shape of the frame from the frame shape measuring apparatus 60. Moreover, the spectacle lens processing apparatus 1 may acquire frame shape data by another method. For example, the spectacle lens processing apparatus 1 may be provided with a frame shape measuring part inside which measures the shape of a frame. In this case, the spectacle lens processing apparatus 1 may acquire frame shape data by measuring the shape of the frame with the frame shape measuring unit. Further, the spectacle lens processing apparatus 1 may acquire frame shape data through a network such as the Internet. You may acquire frame shape data from a personal computer (hereinafter referred to as "PC") or the like. Frame shape data may be obtained by operating the operation unit 50 by an operator and inputting the shape of the frame to the operator.

<Explanation of the phenomenon>

With reference to FIG. 4, the influence of the relative angle of the groove|grooving processing tool 442 with respect to the lens LE on the width of a groove is demonstrated. Fig. 4 is a diagram showing a state in which a groove is formed in the peripheral edge of the lens LE. In order to facilitate understanding of the phenomenon, FIG. 4 shows a case where a groove is formed in the peripheral edge of a rectangular lens. Two drawings shown on the upper side of FIG. 4 are X-Y plan views, and two views shown on the lower side are X-Z plan views. In the coordinate system of Fig. 4, the axis S2 of the lens chuck axes 16L and 16R is parallel to the Z axis. A range in which a groove is formed by contacting the grooved hole 442 and the lens LE is indicated by an oblique line. As described above, the axis S1 of the rotation axis of the grooving tool 442 is θ degrees with respect to the axis line S2 of the lens chuck shafts 16L and 16R that rotates the lens LE (15 degrees in this embodiment). Fig.) It is tilted. Therefore, when the outer shape of the grooved cutting tool 442 is viewed from the X-Y plane, it appears not circular but elliptical. The spectacle lens processing apparatus 1 performs groove digging while rotating the lens LE around the axis S2.

In the state shown on the left side of FIG. 4, a straight line passing through the center of the grooving tool 442 and reaching the part to be processed at the peripheral edge of the lens LE perpendicularly to the center of the grooving tool 442 It coincides with the straight line passing through the rotation center (axis line S2) of the lens LE. In this case, as shown in the lower left side of FIG. 4, the width of the groove to be formed is equal to the thickness T of the grooving processing tool 442 even when the axis line S1 is inclined with respect to the axis line S2. It becomes almost the same width (d).

On the other hand, in the state shown on the right side of FIG. 4, a straight line passing through the center of the grooving tool 442 and vertically touching the part to be processed of the lens LE is the center of the grooving tool 442 and the lens It is inclined with respect to a straight line passing through the center of rotation of (LE) (axis line S2). In this case, as shown in the lower right side of FIG. 4, the substantially linear portion (the portion indicated by the oblique line) where the grooving processing tool 442 and the lens LE contact is the direction in which the formed groove extends (FIG. 4 In the left and right directions). As a result, the width of the formed groove becomes wider than the width d shown on the left side of FIG. 4 (D).

As described above, when the axis S1 of the rotational shaft of the grooving tool 442 is inclined with respect to the axis S2 of the lens chuck shafts 16L and 16R, the width of the groove formed by one machining operation is , In some cases, it is wider than the thickness T (in detail, the thickness in the Z-axis direction) of the grooving processing tool 442. When the processing tool diameter R of the grooving tool 442 is made small, the enlargement of the groove decreases. However, when the processing tool diameter R is made small, interference between each member (for example, interference between the holding member 42 and the carriage 15) is liable to occur. As a result, it becomes difficult to freely design the interior layout of the spectacle lens processing apparatus 1, and it is difficult to realize the miniaturization of the apparatus. Moreover, even if the diameter R of the processing tool is made small, the expansion of the width of the groove cannot be completely prevented. The spectacle lens processing apparatus 1 of the present embodiment is a relative angle of the grooving processing tool 442 with respect to the lens LE (hereinafter, simply referred to as a "relative angle of the grooving processing tool 442" in some cases. ) And the groove diameter R of the groove cutting tool 442 can be reduced, and the groove can be made more accurately.

Further, by providing a mechanism for adjusting the angle of the axis S1 with respect to the axis S2, it is possible to improve the accuracy of the width of the groove, but there are cases where sufficient adjustment cannot be performed only with this method. Therefore, the technique illustrated in this embodiment is particularly effective when the angles of the axis lines S1 and S2 (that is, the relative angle of the grooving processing tool 442) are fixed, but the axis lines S1 and S2 It is also effective when the angle can be adjusted.

<Grooving trajectory calculation processing>

With reference to Figs. 5 to 9, a description will be given of the processing for calculating the grooving trajectory executed by the CPU 5 of the spectacle lens processing apparatus 1. The grooving trajectory is a relative trajectory of the grooving tool 442 (the center of the grooving tool 442 in this embodiment) with respect to the peripheral edge of the lens LE. The spectacle lens processing apparatus 1 forms a groove in the peripheral edge of the lens LE by moving the grooved hole 442 relative to the lens LE according to the calculated grooved trajectory. In the grooving trajectory calculation processing, a groove for forming an edge portion on the front side of the lens LE (hereinafter referred to as a ``front side edge portion'') among a pair of front and rear edge portions in a groove to be formed The digging trajectory and the groove digging trajectory for forming the rear edge portion of the lens LE (hereinafter referred to as "rear surface side edge portion") are calculated separately.

As described above, in the nonvolatile memory 8 of the spectacle lens processing apparatus 1, a grooved trajectory calculation program for controlling the grooved trajectory calculation processing is stored. When the CPU 5 inputs an instruction for executing the calculation of the grooving path from the operation unit 50 or an external device, the CPU 5 executes the grooving path calculation process shown in FIG. 5 according to the grooving path calculation program.

As shown in Fig. 5, when the grooved trajectory calculation process is started, the position and shape of the groove to be formed in the peripheral edge of the lens LE are set (S1). Various methods can be adopted for the method of setting the position and shape of the groove. As an example, in the present embodiment, from the shape of the rim of the frame measured by the frame shape measuring device 60 (see Fig. 3), the jade data of the lens LE is acquired. The edge position of the lens LE is obtained by driving the lens shape measuring unit 20 based on the jade data. The position and shape of the groove is set so that the center of the width direction of the groove is located at a position obtained by dividing the edge thickness of the lens LE by a constant ratio. In this embodiment, both the width (0.6 mm) of the groove to be formed and the depth (0.3 mm) of the groove are fixed values, but these can be changed as appropriate. Further, the CPU 5 may set the position and shape of the groove so as to follow the front edge position of the lens LE. The position and shape of the groove may be set according to the shape of the frame.

Subsequently, information on the trajectory of the front edge portion and the trajectory information of the rear edge portion in the groove to be formed are acquired (S2, S3). The trajectory of the front edge portion and the trajectory of the rear edge portion are uniquely determined from the position and shape of the groove set in S1. The trajectory information is a parameter for specifying the shape and position of the trajectory in three dimensions. As an example, in the present embodiment, the coordinate values (x, y, z) of 1000 points located on the trajectory of the front edge portion are acquired as information of the trajectory of the front edge portion. Similarly, coordinate values (x, y, z) of 1000 points located on the trajectory of the rear-side edge portion are obtained as information of the trajectory of the rear-side edge portion. In the present embodiment, the trajectory of the front edge portion and the trajectory of the rear edge portion coincide on the XY plane, and only the position in the Z direction is different.

6 is a diagram schematically showing the relative positional relationship between the trajectory of the front edge portion and the rear edge portion to be formed and the grooving processing tool 442 in three dimensions. In addition, in the spectacle lens processing apparatus 1 of this embodiment, the Y coordinate of the center C of the grooving processing tool 442 is fixed to "0". However, in FIG. 6, in order to facilitate understanding, for convenience, the Y coordinate of the center C is assumed to be positive. The spectacle lens processing apparatus 1 moves the center C (x ₀ , y ₀ , z ₀ ) of the grooving processing tool 442 relative to the peripheral edge of the lens LE to the lens LE. Form a groove.

Subsequently, a known grindstone diameter correction process (refer to Japanese Laid-Open Patent Publication No. Hei 5-212661, etc.) is performed, whereby the trajectory of the center C of the grooving tool 442 on the XY plane is calculated (S4). ). More specifically, in the processing of S4, after the depth of the groove is considered, the center C on the XY plane is such that the outer circumferential end of the grooved hole 442 is relatively moved along the grooved portion of the lens LE. The trajectory of is calculated. As described above, in the present embodiment, the trajectory of the front edge portion and the trajectory of the rear edge portion coincide on the XY plane. Therefore, the trajectory of the center C on the XY plane calculated in S1 is used as a relative trajectory of the center C when forming the front edge of the groove, and the center C when forming the rear edge ) Is also used as a relative trajectory.

Next, a three-dimensional trajectory (hereinafter referred to as a ``front-side trajectory'') of the center C of the grooved hole 442 with respect to the lens LE is calculated when forming the front edge portion (S5). ). Since the trajectory of the center C on the XY plane has already been calculated in S4, the value z ₀ of the Z coordinate of the center C is calculated in S5. The front-side trajectory is a relative angle of the grooving tool 442 with respect to the lens LE (hereinafter, simply referred to as “the relative angle of the grooving tool 442”), and the grooving tool 442 ) Is calculated by taking into account the machining tool diameter (R). As described above, the relative angle of the grooving processing tool 442 is determined by the angle θ of the two axis lines S1 and S2. Therefore, the CPU 5 of this embodiment calculates the front side trajectory using the angle θ.

Hereinafter, an example of a method of calculating the front side trajectory will be described with reference to FIGS. 6 and 7. First, as shown in FIG. 6, in order to specify the machining tool plane P in which the machining part (in detail, the center in the thickness direction of the machining part) of the grooving machining tool 442 is included, the machining tool plane P ) Is obtained. For example, the axis line S1 of the rotation axis of the grooving processing tool 442 is α degrees in the X direction and in the Y direction with respect to the axis line S2 (that is, in the Z direction) of the lens chuck shafts 16L and 16R. It is assumed that β is also inclined. In this case, a vector of Z = 1 is rotated by α degrees around the Y axis and by β degrees around the X axis as a normal vector of the processing tool plane P. The normal vector is obtained by the following (Equation 1).

[Equation 1]

The machining tool plane P passes through the center C (x ₀ , y ₀ , z ₀ ) of the grooving tool 442. Therefore, the processing tool plane P is represented by the following (Equation 2).

[Equation 2]

By modifying the above (Equation 2), it becomes (Equation 3) for obtaining the value z ₀ of the Z coordinate of the center (C). (Equation 3) is calculated based on the relative angle of the grooving tool 442. Therefore, the CPU 5 can calculate the trajectory in consideration of the influence of the relative angle of the grooving processing tool 442 on the width of the groove by using (Equation 3). In this embodiment, a grooved trajectory calculation program is prepared in advance so that processing can be executed using (Equation 3). In a configuration in which the relative angle of the grooving tool 442 changes, the values of α and β may be appropriately substituted into (Equation 3).

[Equation 3]

Next, by substituting the coordinates (x, y, z) of the point located on the front edge to be formed into (Equation 3), the value z ₀ of the Z coordinate of the center (C) is calculated. As a result, the trajectory for the front side is calculated. In this embodiment, the front side trajectory is calculated by specifying 1000 positions of the centers C on the front side trajectory. Specifically, as shown in FIG. 7, in the case of obtaining z _n of the n-th center (C) (x _n , y _n , z _n ), out of 1000 points located on the front edge, grooving processing A plurality of points overlapping the sphere 442 and the XY plane are specified as cuttable points. Here, the CPU 5 uses the diameter of the grooving tool 442 to specify the cuttable point overlapping the grooving tool 442 on the XY plane. Therefore, it is possible to calculate the trajectory in consideration of the influence of the diameter of the groove cutting tool 442 on the width of the groove.

An example of an algorithm for specifying the cutting possible point will be described in detail. In the present embodiment, when both points on the front edge portion and the grooving tool 442 are projected onto the XY plane, the point located inside the projection surface (elliptical shape) of the grooving tool 442 is cut. It is specified as a possible point. Accordingly, a point on the front edge portion in which the values of x and y satisfy the following (Equation 4) becomes a cuttable point. In addition, as mentioned above, in this embodiment, the Y coordinate y _n of the center C of the grooving processing tool 442 is fixed to "0". In addition, R is the diameter of the grooving tool 442.

[Equation 4]

The CPU 5 calculates the value z ₀ of the Z coordinate when cutting each cuttable point by substituting the coordinates (x, y, z) of each specific cuttable point into the above (Equation 3). In the example shown in FIG. 7, in order to cut the cuttable point K1 in a state where the X coordinate of the center C of the grooving tool 442 is x _n and the Y coordinate is y _n , in FIG. 7 It is necessary to bring the left side of the grooving processing tool 442 into contact with the cuttable point K1. The value z ₀ of the Z coordinate of the center C in this state can be calculated by substituting the coordinates (x, y, z) of the cuttable point K1 into (Equation 3). In addition, in order to cut the cuttable point K2 in a state where the X coordinate of the center C of the grooving tool 442 is x _n and the Y coordinate is y _n , the grooving tool in FIG. 7 ( It is necessary to bring the right side of 442) into contact with the cuttable point K2. The value z ₀ of the Z coordinate of the center C in this state can be calculated by substituting the coordinates (x, y, z) of the cuttable point K2 into (Equation 3). By performing the above processing for each cuttable point, one or more values z ₀ are obtained.

Here, when a plurality of values z ₀ are obtained, it is necessary to specify one value z ₀ so that the front edge portion is not wider than a predetermined value. Specifically, of the plurality of values z ₀ obtained in detail, except for the value z _{0 in} which the grooving processing tool 442 is positioned at the rearmost side of the lens LE, the front edge portion becomes wider forward than planned. For example, in the example shown in FIG. 7, the spectacle lens processing apparatus 1 can cut the cuttable point K2 while the X coordinate of the center C is x _n and the Y coordinate is y _n . However, along with the cutting possible point K2, the portion in front of the front edge portion to be formed is also cut at the same time. The same applies to cutting other possible cutting points other than K1 and K2. Therefore, the CPU 5 determines the value z ₀ for positioning the grooving tool 442 on the rearmost side of the lens LE among the obtained values z ₀ (in the example shown in FIG. 7, the value z ₀ is the largest _. ) To specify the coordinates (x _n , y _n , z _n ) of the n-th center (C).

The CPU 5 specifies a plurality of positions (1000 in the present embodiment) of the center C on the front side trajectory by the above method. A set of a plurality of specific positions is taken as a trajectory for the front side of the grooving tool 442. In short, the CPU 5 calculates a set of positions contacting the front edge from the rearmost side with respect to the lens LE among positions when the grooving processing tool 442 contacts the front edge. Calculate the trajectory for the front side.

Returning to the description of FIG. 5. When the three-dimensional front side trajectory is calculated (S5), a process of calculating the three-dimensional rear side trajectory is performed (S6). The rear-side trajectory is a relative trajectory of the grooved hole 442 with respect to the lens LE when forming the rear-side edge portion of the groove. In the processing of calculating the rear side trajectory, the point in which the front-rear direction is reversed is only different from the processing of S5. In short, the CPU 5 calculates the rear side trajectory by substituting the coordinates (x, y, z) of the point located on the rear side edge portion to be formed into the above-described (Equation 3).

More specifically, in the case of obtaining z _n of the n-th center (C) (x _n , y _n , z _n ), out of 1000 points located on the rear edge, the grooving tool 442 and XY A plurality of points overlapping on the plane are specified as cuttable points by (Equation 4). The CPU 5 substitutes the coordinates (x, y, z) of each specific cuttable point into the above (Equation 3) to set the value z ₀ of the Z coordinate when cutting each cuttable point by 1 or more. Calculate. The CPU 5 sets the value z ₀ (in the example shown in FIG. 7, the smallest value z ₀ ) to position the grooving tool 442 on the front side so that the rear edge portion does not widen rearward than planned. By specifying, the coordinates (x _n , y _n , z _n ) of the n-th center (C) are specified. By the above method, a plurality of positions of the center C on the rear-side trajectory are specified, and a set of a plurality of specific positions are set as the rear-side trajectory. In short, the CPU 5 calculates a set of positions that contact the lens LE from the front side to the rear edge of the positions when the grooving processing tool 442 contacts the rear edge. Calculate the trajectory for the rear side.

Subsequently, the front side trajectory and the rear side trajectory calculated in S5 and S6 are shifted in the Z direction based on the thickness T of the grooving tool 442 (S7). In S5 and S6 of the present embodiment, the front side trajectory and the rear side trajectory are calculated assuming that the thickness T of the grooving processing tool 442 is "0". In this case, as shown in Fig. 8, when the grooved hole 442 is moved relative to each of the front side trajectory and the rear side trajectory, the width of the groove actually formed is affected by the thickness T, and S1 It becomes wider than the width of the groove set in. Therefore, in S7 of this embodiment, the value of z ₀ of the front side trajectory is shifted to the plus side (rear side) by the distance S, and the value of z ₀ of the rear side trajectory is negative by the distance S. It is shifted to the side (front side). Further, the distance S is uniquely determined from the thickness T of the grooving tool 442. In this embodiment, it becomes "S=T/2cosθ". Further, in the process of S7, at least one of the front side trajectory and the rear side trajectory may be shifted so that the distance between the front side trajectory and the rear side trajectory becomes close by 2S. Therefore, the distance for shifting each of the two trajectories can be appropriately changed.

Next, it is determined whether or not there is a portion in which the front and rear sides of the calculated front-side trajectory and the rear-side trajectory are reversed (S8). When the width of the groove does not increase due to the influence of the grooving tool 442, the front and rear of the two trajectories are not reversed. However, as illustrated in FIG. 9, when the width of the groove becomes remarkable, a portion where two trajectories are forward and backward may occur. In the example shown in Fig. 9, when the center C of the grooving hole 442 is relatively moved along the front side trajectory 71 calculated in S5, the actually formed front side edge portion is a predetermined front side edge Matches part 80. However, in the upper right portion of the trajectory, a portion of the rear side edge portion actually formed widens rearward than the predetermined rear side edge portion 90 occurs. In addition, when the center (C) of the grooving hole 442 is moved relative to the rear side trajectory 72 calculated in S6, the actually formed rear side edge portion coincides with the predetermined rear side edge portion 90. do. However, in the upper right portion of the trajectory, there is a portion where the front edge portion actually formed is wider forward than the predetermined front edge portion 80. In a portion where the edge portions of the front side and the rear side are widened, the rear side trajectory 72 is located on the front side than the front side trajectory 71, and the front and rear of the two trajectories are reversed.

If there is no part in which the front and rear of the two trajectories are reversed (S8: NO), the process proceeds to S10 as it is. When there is a site in which the front and rear of the two trajectories are reversed (S8: YES), the rear side trajectory 72 in the reversing site is replaced with the front side trajectory 71, and a new rear side trajectory 73 is replaced. It is set (S9). In short, as shown on the right side of Fig. 9, in a portion other than the reversing portion, the grooving tool 442 moves relative to the rear side trajectory 72 calculated in S6, thereby forming the rear edge portion 90 . However, at the reversing portion, the grooving tool 442 moves relative to the front side trajectory 71 calculated in S5, not the rear side trajectory 72 calculated in S6. As a result, in the reversing portion, the rear edge portion actually formed widens rearward than the predetermined rear edge portion 90, but the groove does not widen forward than the predetermined portion. Accordingly, the spectacle lens processing apparatus 1 can more accurately form a groove in which the appearance from the front side of the lens LE is less likely to deteriorate.

Subsequently, grooving data for controlling the relative movement of the grooving tool 442 with respect to the lens LE is created based on the front side trajectory and the rear side trajectory calculated in S1 to S9 (S10). Specifically, grooving data for moving the relative position of the center C of the grooving tool 442 with respect to the lens LE along the front side trajectory calculated in S5 is created. Further, grooving data for moving the relative position of the center C of the grooving tool 442 with respect to the lens LE along the trajectory for the rear side calculated in S6 and S9 is created.

When the spectacle lens processing apparatus 1 performs the processing of a groove, first, in accordance with one of the front-side grooving data and the rear-side grooving data, the grooving processing tool 442 is relatively moved by at least one circumference or more. Let it. After that, the grooving tool 442 is relatively moved according to the other grooving data. As a result, a front edge portion and a rear edge portion are formed.

As described above, in the spectacle lens processing apparatus 1 of the present embodiment, the relative angle of the grooving tool 442 with respect to the lens LE and the processing tool diameter R of the grooving tool 442 Based on the relative trajectory with respect to the lens LE of the grooving processing tool 442 when forming the front edge portion and the lens LE of the grooving processing tool 442 when forming the rear side edge portion, Calculate the relative trajectories for each. In short, after taking into account the relative angle of the grooving processing tool 442 and the processing tool diameter R, it is possible to accurately create the grooving data for forming each of the front edge portion and the rear edge portion. Therefore, the spectacle lens processing apparatus 1 can reduce the influence of the relative angle of the groove|grooving processing tool 442 and the processing tool diameter R, and can perform grooving more accurately. In short, fluctuations in the width of the formed groove can be suppressed.

Depending on the relationship between the relative angle of the grooving processing tool 442, the processing tool diameter (R), the thickness (T), and the width of the groove to be formed, the trajectory for the rear side calculated in S6 is for the front side calculated in S5. There may be a part located on the front side of the trajectory. In this part, since the groove is wider toward the front side than the front side edge portion to be formed, the appearance of the spectacles from the front side is deteriorated. The spectacle lens processing apparatus 1 of this embodiment can prevent the groove from widening toward the front side rather than the front side edge portion to be formed by partially replacing the rear side trajectory with the front side trajectory. Accordingly, the spectacle lens processing apparatus 1 can more accurately form a groove in which the appearance of the spectacles is less likely to deteriorate.

In the spectacle lens processing apparatus 1 of the present embodiment, when the grooving tool 442 contacts the front edge portion to be formed, among the relative positions of the grooving tool 442 with respect to the lens LE , By calculating a set of positions that are the rearmost with respect to the lens LE, the front side trajectory is calculated. In addition, among the relative positions of the grooving tool 442 with respect to the lens LE when the grooving tool 442 contacts the rear edge to be formed, the most front side with respect to the lens LE The trajectory for the rear side is calculated by calculating the set of positions to be. Accordingly, the spectacle lens processing apparatus 1 can accurately calculate the front side trajectory and the rear side trajectory in consideration of the relative angle of the grooving processing tool 442 and the processing tool diameter R.

The spectacle lens processing apparatus 1 of this embodiment calculates each of the front side trajectory and the rear side trajectory based on the thickness T of the grooving tool 442. Therefore, the spectacle lens processing apparatus 1 can more accurately calculate the front side trajectory and the rear side trajectory.

It goes without saying that the technique illustrated in the present disclosure is not limited to the above embodiment, and various modifications are possible. In the above-described embodiment, the spectacle lens processing apparatus 1 calculates a grooved trajectory, and forms a groove in the lens LE based on the calculated grooved trajectory. However, it is also possible to calculate the grooving trajectory in a device different from the spectacle lens processing apparatus 1. For example, the CPU of the PC may execute the grooving path calculation program described in the above embodiment to calculate the grooving path. In this case, the spectacle lens processing apparatus may form a groove by driving each configuration based on the grooved trajectory calculated by the PC. As described above, the calculating device for calculating the grooved trajectory is not limited to the spectacle lens processing device 1. In addition, it goes without saying that the technique illustrated in the present disclosure can be applied to both the case where the groove is formed around the entire circumference of the lens LE and the case where the groove is formed in a part of the peripheral edge.

The specific calculation method of the front side trajectory and the rear side trajectory can be changed. For example, CPU (5) is x ₀ and y, while it is fixed to _zero, going to reduce the value of z ₀ slowly, in the z _zero when the grooving processing, obtain (442) the first access to the front side edge You may calculate the passing point of the center C on the front side trajectory by obtaining a value. Likewise, going by increasing the value of z ₀ slowly, grooving machining obtain 442 is by determining the value of z ₀ at the time access to the unit's first rear-side edge of the back calculate the passing point of cheukyong trajectory center (C) on the You can do it. In short, the CPU 5 only needs to calculate the front side trajectory and the rear side trajectory separately, taking into account the relative angle of the grooving processing tool 442 and the processing tool diameter R, and a detailed calculation method can be appropriately set. .

In the above embodiment, the CPU 5 replaces the rear-side trajectory with the front-side trajectory in the reversing portion where the front side trajectory calculated in S5 and the rear side trajectory calculated in S6 are reversed. As a result, the groove is prevented from widening toward the front side than expected. However, it is also possible to adopt the two trajectories calculated in S5 and S6 as they are without preventing the expansion of the groove to the front side. Also in this case, the CPU 5 can calculate the front side trajectory and the rear side trajectory separately in consideration of the relative angle of the grooving machining tool 442 and the machining tool diameter R. Therefore, the spectacle lens processing apparatus 1 can perform accurate groove digging compared to the conventional one.

In the above embodiment, the CPU 5 calculates the front trajectory and the rear trajectory without considering the thickness T of the grooving processing tool 442, and then shifts the calculated trajectory based on the thickness T. Let it. However, the method of reflecting the thickness T on the trajectory is not limited to the method illustrated in the above embodiment. For example, the CPU 5 may reflect the thickness T at the time point of calculating the trajectory in S5 and S6. More specifically, the CPU 5 may calculate a front-side trajectory so that the front end of the grooving tool 442 moves relative to the front-side edge portion to be formed. Similarly, the rear side trajectory may be calculated so that the end portion on the rear side of the grooving processing tool 442 moves relative to the rear side edge portion to be formed.

In the above embodiment, the CPU 5 calculates the front side trajectory and the rear side trajectory separately, and then replaces the rear side trajectory with the front side trajectory in a portion where the front and rear of the two trajectories are reversed. As a result, deterioration of the appearance of the spectacles on the front side is suppressed. However, the method of suppressing the expansion of the groove to the front side can also be changed. For example, the CPU 5 specifies a portion (expansion portion) in which the width of the groove formed by passing the grooving tool 442 relatively once is wider than the width of the groove to be formed. Only the trajectory for the anterior side is calculated in the extended area. For areas other than the extended area, the trajectory for the front side and the trajectory for the rear side are calculated separately. Also in this case, the spectacle lens processing apparatus 1 can suppress the expansion of the groove to the front side. In short, when it is assumed that the CPU 5 relatively moves the grooving processing tool 442 along the rear edge to be formed, the front edge to be formed is a portion where the front edge is wider than the predetermined front side. The trajectory for the rear side may be calculated so as to move the grooving tool 442 along the part.

1: Glasses lens processing device
5: CPU
8: nonvolatile memory
162: lens rotation motor
171: Motor for Z-axis movement
191: Motor for X-axis movement
442: Grooving processing tool
LE: Lens

Claims (7)

A spectacle lens processing apparatus comprising a grooved hole having a circular annular shape in contact with the lens, and forming a groove in the peripheral edge of the lens by moving the grooved hole relatively with respect to the peripheral edge of the lens as,
Front-side information acquisition means for acquiring information on a trajectory of a front-side edge portion located on the front side of the lens, among the pair of edge portions of the grooves formed in the lens;
A rear-side information acquisition means for acquiring information on a trajectory of a rear-side edge portion located on the rear side of the lens among the pair of edge portions;
When forming the front-side edge portion on the lens, a trajectory for the front side, which is a relative trajectory of the grooving tool with respect to the lens, a relative angle of the grooving tool with respect to the lens, and a processing tool diameter of the grooving tool A front-side lens trajectory calculation means that is calculated based on,
A rear-side lens trajectory calculating means for calculating a rear-side trajectory, which is a relative trajectory of the grooved hole with respect to the lens when the rear-side edge portion is formed on the lens, based on the relative angle and the processing tool diameter; and ,
In a portion in which the rear side trajectory calculated by the rear side lens trajectory calculating means is located on the front side than the front side trajectory calculated by the front side lens trajectory calculating means, the rear side trajectory is calculated as the front surface. A spectacle lens processing apparatus comprising: a substitution means for substituting a side trajectory. A spectacle lens processing apparatus comprising a grooved hole having a circular annular shape in contact with the lens, and forming a groove in the peripheral edge of the lens by moving the grooved hole relatively with respect to the peripheral edge of the lens as,
Front-side information acquisition means for acquiring information on a trajectory of a front-side edge portion located on the front side of the lens, among the pair of edge portions of the grooves formed in the lens;
A rear-side information acquisition means for acquiring information on a trajectory of a rear-side edge portion located on the rear side of the lens among the pair of edge portions;
When forming the front-side edge portion on the lens, a trajectory for the front side, which is a relative trajectory of the grooving tool with respect to the lens, a relative angle of the grooving tool with respect to the lens, and a processing tool diameter of the grooving tool A front-side lens trajectory calculation means that is calculated based on,
A rear-side lens trajectory calculation means for calculating a rear-side trajectory, which is a relative trajectory of the grooved hole with respect to the lens when the rear-side edge portion is formed on the lens, based on the relative angle and the processing tool diameter. Equipped,
The front-side lens trajectory calculation means includes the lens in a relative position of the grooved hole with respect to the lens when the grooved hole having the diameter of the processing hole contacts the front edge at the relative angle. A spectacle lens processing apparatus, characterized in that the front-side trajectory is calculated by calculating a set of positions contacting the front-side edge portion from the rearmost side of the spectacle lens. A spectacle lens processing apparatus comprising a grooved hole having a circular annular shape in contact with the lens, and forming a groove in the peripheral edge of the lens by moving the grooved hole relatively with respect to the peripheral edge of the lens as,
Front-side information acquisition means for acquiring information on a trajectory of a front-side edge portion located on the front side of the lens, among the pair of edge portions of the grooves formed in the lens;
A rear-side information acquisition means for acquiring information on a trajectory of a rear-side edge portion located on the rear side of the lens among the pair of edge portions;
When forming the front-side edge portion on the lens, a trajectory for the front side, which is a relative trajectory of the grooving tool with respect to the lens, a relative angle of the grooving tool with respect to the lens, and a processing tool diameter of the grooving tool A front-side lens trajectory calculation means that is calculated based on,
A rear-side lens trajectory calculation means for calculating a rear-side trajectory, which is a relative trajectory of the grooved hole with respect to the lens when the rear-side edge portion is formed on the lens, based on the relative angle and the processing tool diameter. Equipped,
The rear-side lens trajectory calculation means includes the lens in a relative position of the grooved hole with respect to the lens when the grooved hole having the diameter of the processing hole contacts the rear edge portion at the relative angle. The spectacle lens processing apparatus according to claim 1, wherein the rear-side trajectory is calculated by calculating a set of positions that contact the rear-side edge portion from the front side of the spectacle. In order to form a groove at the circumferential edge of the lens, a grooving trajectory executed by a calculation device that calculates a trajectory of a movement relative to the peripheral edge of the lens of a grooving processing tool having a circular annular shape in contact with the lens As a storage medium in which the calculation program is stored,
By executing the grooved trajectory calculation program by the processor of the calculation device,
A front-side information acquisition step of acquiring information on a trajectory of a front-side edge of the pair of edge portions of the groove formed in the lens, which is located on the front side of the lens;
A rear-side information acquisition step of acquiring information on a trajectory of a rear-side edge portion located on the rear side of the lens among the pair of edge portions;
When forming the front-side edge portion on the lens, a trajectory for the front side, which is a relative trajectory of the grooving tool with respect to the lens, a relative angle of the grooving tool with respect to the lens, and a processing tool diameter of the grooving tool A front-side lens trajectory calculation step that is calculated based on,
A rear-side lens trajectory calculation step of calculating a rear-side trajectory, which is a relative trajectory of the grooved hole with respect to the lens when the rear side edge portion is formed on the lens, based on the relative angle and the processing tool diameter; and ,
In a portion where the rear side trajectory calculated by the rear side lens trajectory calculation step is located on the front side than the front side trajectory calculated by the front side lens trajectory calculation step, the rear side trajectory is calculated as the front side. A storage medium storing a grooved trajectory calculation program, characterized in that a substitution step of substituting a side trajectory is performed in the calculation device. In order to form a groove at the circumferential edge of the lens, a grooving trajectory executed by a calculation device that calculates a trajectory of a movement relative to the peripheral edge of the lens of a grooving processing tool having a circular annular shape in contact with the lens As a storage medium in which the calculation program is stored,
By executing the grooved trajectory calculation program by the processor of the calculation device,
A front-side information acquisition step of acquiring information on a trajectory of a front-side edge of the pair of edge portions of the groove formed in the lens, which is located on the front side of the lens;
A rear-side information acquisition step of acquiring information on a trajectory of a rear-side edge portion located on the rear side of the lens among the pair of edge portions;
When forming the front-side edge portion on the lens, a trajectory for the front side, which is a relative trajectory of the grooving tool with respect to the lens, a relative angle of the grooving tool with respect to the lens, and a processing tool diameter of the grooving tool A front-side lens trajectory calculation step that is calculated based on,
The rear-side lens trajectory calculation step of calculating a rear-side trajectory, which is a relative trajectory of the grooved hole with respect to the lens when the rear-side edge portion is formed on the lens, based on the relative angle and the processing tool diameter Executed on the calculation device,
In the front-side lens trajectory calculation step, when the grooved hole having the diameter of the processing hole contacts the front edge portion at the relative angle, among the relative positions of the grooved hole with respect to the lens, the lens A storage medium storing the grooved trajectory calculation program, characterized in that the front-side trajectory is calculated by calculating a set of positions contacting the front-side edge portion from the rearmost side of each other. In order to form a groove at the circumferential edge of the lens, a grooving trajectory executed by a calculation device that calculates a trajectory of a movement relative to the peripheral edge of the lens of a grooving processing tool having a circular annular shape in contact with the lens As a storage medium in which the calculation program is stored,
By executing the grooved trajectory calculation program by the processor of the calculation device,
A front-side information acquisition step of acquiring information on a trajectory of a front-side edge of the pair of edge portions of the groove formed in the lens, which is located on the front side of the lens;
A rear-side information acquisition step of acquiring information on a trajectory of a rear-side edge portion located on the rear side of the lens among the pair of edge portions;
When forming the front-side edge portion on the lens, a trajectory for the front side, which is a relative trajectory of the grooving tool with respect to the lens, a relative angle of the grooving tool with respect to the lens, and a processing tool diameter of the grooving tool A front-side lens trajectory calculation step that is calculated based on,
The rear-side lens trajectory calculation step of calculating a rear-side trajectory, which is a relative trajectory of the grooved hole with respect to the lens when the rear-side edge portion is formed on the lens, based on the relative angle and the processing tool diameter Executed on the calculation device,
In the rear-side lens trajectory calculation step, in the case where the grooved hole having the diameter of the processing hole contacts the rear edge portion at the relative angle, among the relative positions of the grooved hole with respect to the lens, the lens A storage medium storing the grooved trajectory calculation program, characterized in that the rear-side trajectory is calculated by calculating a set of positions that contact the rear-side edge portion from the front side of the groove. delete

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